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Now that we have our console app project, let's see what it takes to convert it to a simple web app.
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Let's convert our console app
project to a simple web app.
0:00
We'll start by adding a dependency for
Kestrel.
0:03
Remember, Kestrel is the cross-platform
managed web server for
0:06
hosting ASP.NET Core apps.
0:11
First, we add the name
of the new get package.
0:14
Microsoft.AspNetCore.Server.Kestrel.
0:18
Then we provide the version
number that we want to use.
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Which in our case is 1.0.0.
0:30
When we save the file, code will recognize
that we just added a new dependency,
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then ask if we want to
run the restore command.
0:38
Next, we'll open Program.cs and
make some modifications.
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First, we need to add
the following name spaces,
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using Microsoft.AspNetCore.Hosting.
0:55
Using Microsoft.AspNetCore.Builder.
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Then using Microsoft.AspNetCore.Http.
1:05
Then in the main method, we need to
instantiate and configure the host for
1:11
our web app.
1:16
Var host = new WebHostBuilder.
1:20
We need to tell the host to use Kestrel
as the server by calling the UseKestrel
1:25
extension method.
1:29
Then we configure the host by
calling the Configure method.
1:32
The Configure method expects
a delegate that accepts a parameter for
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the IApplicationBuilder instance.
1:42
Which we can use to configure our app.
1:44
On the app builder,
we call the Run method.
1:48
The Run method also expects a delegate
that accepts a parameter for
1:56
the HTTP context for the current request.
2:00
The context gives us
access to the Response.
2:05
On which is an extension method,
WriteAsync,
2:09
that allows us to write
asynchronously to the response body.
2:12
Our Run delegate represents a very
simple middleware component.
2:21
We'll see more examples of ASP.NET Core
middleware later in this workshop.
2:25
Lastly, we Build and Run the host.
2:30
Now we can press F5 to
run our application.
2:37
Once the application has been started,
we can browse to the URL localhost:5000.
2:44
And here's the output from our middleware.
2:54
When you create a web app project using
the .NET CLI or the full version of
3:01
Visual Studio, the contents of the
Program.cs file will be provided for you.
3:05
So you typically won't
write this code yourself.
3:11
That being said, you can see that it's
relatively easy to get a web app host and
3:14
server up and running.
3:18
Also, our web app isn't very indicative
3:20
of what a typical ASP.NET Core
web app looks like.
3:23
Rather, this is an example
of the smallest,
3:26
simplest web app that you can build.
3:29
Though it's not a very practical solution.
3:31
For instance,
most ASP.NET Core web apps will use MVC
3:34
instead of directly writing to
the response body, as we did here.
3:39
We'll see an example of an MVC
web app in the next video.
3:43
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